[Qemu-block] [PATCH-for-4.1? 5/7] target/ppc: Rewrite a fall through comment

[Philippe Mathieu-Daudé]

GCC9 is confused by this comment when building with CFLAG
-Wimplicit-fallthrough=2:

  target/ppc/mmu_helper.c: In function ‘dump_mmu’:
  target/ppc/mmu_helper.c:1349:12: error: this statement may fall through 
[-Werror=implicit-fallthrough=]
   1349 |         if (ppc64_v3_radix(env_archcpu(env))) {
        |            ^
  target/ppc/mmu_helper.c:1356:5: note: here
   1356 |     default:
        |     ^~~~~~~
  cc1: all warnings being treated as errors

Rewrite the comment using 'fall through' which is recognized by
GCC and static analyzers.

Reported-by: Stefan Weil <address@hidden>
Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
 target/ppc/mmu_helper.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/target/ppc/mmu_helper.c b/target/ppc/mmu_helper.c
index 261a8fe707..862824b073 100644
--- a/target/ppc/mmu_helper.c
+++ b/target/ppc/mmu_helper.c
@@ -98,7 +98,7 @@ static int pp_check(int key, int pp, int nx)
         case 0x1:
         case 0x2:
             access |= PAGE_WRITE;
-            /* No break here */
+            /* fall through */
         case 0x3:
             access |= PAGE_READ;
             break;
@@ -706,7 +706,7 @@ static int mmu40x_get_physical_address(CPUPPCState *env, 
mmu_ctx_t *ctx,
             if (pr != 0) {
                 goto check_perms;
             }
-            /* No break here */
+            /* fall through */
         case 0x3:
             /* All accesses granted */
             ctx->prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
@@ -720,7 +720,7 @@ static int mmu40x_get_physical_address(CPUPPCState *env, 
mmu_ctx_t *ctx,
                 ret = -2;
                 break;
             }
-            /* No break here */
+            /* fall through */
         case 0x1:
         check_perms:
             /* Check from TLB entry */
-- 
2.20.1